When looking at the LATTs, don't forget to look at the contractual duty limit on your rotation. They are often more restrictive than the new 117 limits. And the two hour MAX extension of that number would produce a different LATT time than those produced on the addendum paperwork.
Also, when I calculate the max block limit numbers below that, I keep in the back of my mind whether or not the max taxi is greater than 3 hours. If it is, your taxi out is limited by the Passenger Bill of Rights. If it is not, then our max duty will send us back to the gate first. It's good to be plugging in a bunch of different scenarios with these numbers to try to understand how it all relates.
I had a situation earlier in the month where I arrived at the hotel so tired, I put my name above the captain's on the sign in sheet. He was so busy trying to get a hold of Crew Tracking that I thought that I would handle the pickup time with the hotel. And with my name on the top line, I unwittingly made myself the first point of contact for all things trivial with the hotel. Big mistake. After squaring it away with the desk downstairs, I was called in my room to let me know that they had spoken with the transportation and it was all worked out. 8ish hours later I received another phone call from downstairs wondering why we weren't down there for our original pick up time. Since this was now only 20 minutes before my alarm, it was going to be difficult to get back to sleep, especially because I was laying there trying to calculate whether or not I had the 8 hour opportunity. Oh, the irony!